The announcement of the successor to the Intel Core Duo processor in the summer of 2006 also marked the reunification of Intel’s desktop and mobile product lines. Low power consumption was a principal goal of the Intel Core microarchitecture, and the moblie CPU, previously codenamed Merom, was listed as having a TDPs of 35 watts for the standard version and an impressive 5 watts TDP for Ultra Low Voltage (ULV) versions. Moreover, Intel claimed the chip was capable of 20% more performance at the same power level compared with the Core Duo.
The table below, which compares the mobile Core 2 Duo processor and its closest relation, the Core Duo predecessor, identifies several of the relatively minor improvements in the Core microarchitecture, which combine to achieve a significant hike in overall system performance:
| Core 2 Duo (Merom) | Core Duo (Yonah) | |
|---|---|---|
| Manufacturing Process | 65nm | 65nm |
| Die Size | 143mm2 | 90mm2 |
| Transistors | 291 million | 151 million |
| Clock Speeds | 1.06GHz – 2.4GHz+ | 1.20GHz – 2.33GHz |
| FSB Frequency | 533MHz – 800MHz | 533MHz – 667MHz |
| L1 Cache Size | 32KB + 32KB | 32KB + 32KB |
| L2 Cache Size | 2MB – 4MB Shared | 2MB Shared |
| Pipeline Stages | 14 | 12 |
| Decoders | 1 complex + 3 simple | 1 complex + 2 simple |
| Maximum Decode Rate | 4+1 | 3 |
| Reorder Buffer | 96 | 80 |
| SSE Units | 3 | 1 |
| Socket Interface | Socket-M (PGA/BGA) Socket-P (PGA/BGA) |
Socket-M (PGA/BGA) |
The mobile Core 2 Duo processors, in particular, include a number of advanced innovations, including:
- Intel Dynamic Power Coordination: Coordinates Enhanced Intel SpeedStep Technology and idle power-management state (C-states) transitions independently per core to help save power.
- Intel Dynamic Bus Parking: Enables platform power savings and improved battery life by allowing the chipset to power down with the processor in low-frequency mode.
- Enhanced Intel Deeper Sleep with Dynamic Cache Sizing: Saves power by flushing cache data to system memory during periods of inactivity to lower CPU voltage.
- Mobile Intel Pentium MMX technology guide
- Illustrated Intel Pentium Tillamook CPU technology guide
- Intel Mobile Pentium II technology guide
- Illustrated guide to Cyrix’s MediaGXi technology
- Guide to Intel’s Mobile Celeron CPU
- AMD Mobile K6 CPU Technology Guide
- Intel Mobile Pentium III and Tualatin Pentium III-M Guide
- Speedstep – Intel’s mobile CPU dynamic power management architecture
- Crusoe – Transmeta Corps’ x86 compatible VLIW mobile CPU
- Intel XScale – Pocket PC dynamic power management
- AMD’s Mobile Duron technology guide
- Mobile AMD Athlon 4 technology guide
- Guide to PowerNow! – AMD’s dynamic power management technology
- Intel Pentium 4-M mobile CPU guide
- Intel Centrino mobile computer platform
- Intel Sonomo improves wireless integration in mobile devices
- Illustrated Intel Centrino Duo technology guide
- Merom – Intel’s mobile Core 2 Duo CPU technology guide